Rate Of Reaction Quiz Questions

6 Questions | By Jwilli0074 | Last updated: Apr 5, 2019

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In biology, a reaction is the response of an organism to a stimulus. In chemistry, a reaction is a process in which multiple substances are converted to different substances. What do you know about the rate of reaction?

Questions and Answers

1.

Reactions eventually stop. What is generally the reason for this?
- A.
  
  The catalyst has been used up
- B.
  
  The particles have run out of energy
- C.
  
  One or more of the reactants has been used up.
2.

Marble reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide. In which of these mixtures is the rate of reaction likely to be the greatest?
- A.
  
  1g of marble chips in 100cm3 of hydrochloric acid at 20°C
- B.
  
  1g of powdered marble in 100cm3 of hydrochloric acid at 30°C.
- C.
  
  1g of powdered marble in 100cm3 of hydrochloric acid at 20°C
3.

Which of the following statements about collisions is correct?
- A.
  
  All colliding particles have the same amount of energy
- B.
  
  Only fast-moving particles collide with each other
- C.
  
  Reactions can happen if the colliding particles have enough energy
4.

The rate of reaction increases as the temperature increases. Which of the following statements provides the best explanation for this?
- A.
  
  At lower temperatures the particles do not collide with each other
- B.
  
  At higher temperatures the particles have more energy, move faster and collide more often
- C.
  
  Increasing the temperature increases the number of particles, so they collide more often
5.

When an excess of calcium carbonate reacts with dilute hydrochloric acid, the reaction becomes slower and finally stops because
- A.
  
  The calcium carbonate is covered by bubbles of carbon dioxide
- B.
  
  An insoluble layer of calcium chloride is formed
- C.
  
  The calcium carbonate is all used up
- D.
  
  The hydrochloric acid is all used up
6.

In each of four different experiments, the same mass of magnesium reacts with the same volume of excess sulfuric acid. Which set of conditions will result in the magnesium being used up the fastest?
- A.
  
  Ribbon magnesium, 1 mol/dm3 of acid, 80 degrees celsius
- B.
  
  Powdered magnesium, 0.5 mol/dm3 of acid, 20 degrees celsius
- C.
  
  Ribbon magnesium, 0.5 mol/dm3 of acid, 80 degrees celsius
- D.
  
  Powdered magnesium, 1 mol/dm3 of acid, 80 degrees celsius

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